Directions: Choose the appropriate word/phrase from the given options and fill in the blank.

They _______ when they are out of breathe.

'They' is a plural subject, so it needs the plural verb form 'pant' in the present tense. 'Pants' is the third-person singular form used with 'he/she/it'. 'Sigh' and 'blow' don't match the context of being out of breath from exertion. Note: there is a typo in the question - it should be 'breath' (noun), not 'breathe' (verb), but this doesn't affect the verb choice being tested.